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13,000 MikroTik Routers Hijacked by Botnet for Malspam and Cyberattacks
(thehackernews.com)
Looks to stem from default creds and SPF+all, both of which are amateur hour. In their defense, devices should not allow keeping default creds, and SPF should have never implemented the +all tag. Still, though. It's 2025, not 2005. They should have known.